Stephen G. Simpson Emeritus Professor of Mathematics Breadcrumb Department of Mathematics t20 Stephen G. Simpson Emeritus Professor of Mathematics Department Affiliations Department of Mathematics Interests Mathematical Logic Foundations of Mathematics Recursion Theory Set Theory Combinatorics Email t20@psu.edu Phone +1 814 404 6176 Website http://www.personal.psu.edu/t20/ Education: Ph.D., Massachusetts Institute of Technology, 1971
